EP 2367962 B2 20180718 - METHOD FOR PRODUCING PARTIALLY HARDENED COMPONENTS FROM SHEET STEEL

Title (en)

METHOD FOR PRODUCING PARTIALLY HARDENED COMPONENTS FROM SHEET STEEL

Title (de)

VERFAHREN ZUM HERSTELLEN PARTIELL GEHÄRTETER BAUTEILE AUS STAHLBLECH

Title (fr)

PROCÉDÉ DE FABRICATION DE PIÈCES EN TÔLE D'ACIER PARTIELLEMENT TREMPÉES

Publication

EP 2367962 B2 20180718 (DE)

Application

EP 09795435 A 20091218

Priority

EP 2009067560 W 20091218
DE 102009042387 A 20090921
DE 102008063985 A 20081219
DE 202008016877 U 20081219

Abstract (en)

[origin: WO2010076247A1] The invention relates to a method for producing a sheet steel component having areas of different hardness or ductility, wherein either the sheet steel is cold formed into the component in a tool from a blank and the formed component is then heated to a temperature above the austenitizing temperature and is inserted into a second tool for the purpose of hardening and is quench-hardened in the second tool, or wherein a blank is heated to a temperature above the austenitizing temperature and then is inserted into a forming tool for the purpose of forming and quench-hardening, is formed and quench-hardened there, wherein either during quench-hardening, in areas that should receive a lower hardness or higher ductility, energy is introduced into said areas using at least one induction coil in such a way that a reduced or no quench-hardening takes place, because the cooling down takes place at a temperature above the critical hardening rate, or the temperature in said area is held at a desired higher level until shaping, or the hardened component, after shaping, is bought into or onto another form after the shaping, in or on which inductive action are applied to the component in partial areas in such a way that the existing hardness is partially or completely eliminated.

IPC 8 full level

B21D 22/02 (2006.01); B21D 22/20 (2006.01); B21D 22/26 (2006.01); B21D 37/16 (2006.01); B62D 25/04 (2006.01); C21D 1/10 (2006.01); C21D 1/42 (2006.01); C21D 1/673 (2006.01); C21D 7/13 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C21D 9/54 (2006.01); C21D 9/60 (2006.01)

CPC (source: EP)

B21D 22/022 (2013.01); B21D 22/20 (2013.01); B21D 37/16 (2013.01); B62D 25/04 (2013.01); C21D 1/10 (2013.01); C21D 1/42 (2013.01); C21D 1/673 (2013.01); C21D 7/13 (2013.01); C21D 8/0294 (2013.01); C21D 8/0494 (2013.01); C21D 9/48 (2013.01); C21D 9/54 (2013.01); C21D 9/60 (2013.01); C21D 2221/00 (2013.01); Y02P 10/25 (2015.11)

Citation (opposition)

Opponent :

DE 19723655 A1 19971211 - SSAB HARDTECH AB [SE]
WO 2007017579 A1 20070215 - THYSSENKRUPP SOFEDIT [FR], et al
DE 19743802 A1 19990311 - BENTELER WERKE AG [DE]
DE 202008016877 U1 20090305 - VOESTALPINE AUTOMOTIVE GMBH [AT]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

WO 2010076247 A1 20100708; EP 2367962 A1 20110928; EP 2367962 B1 20150729; EP 2367962 B2 20180718; ES 2550109 T3 20151104; ES 2550109 T5 20181128

DOCDB simple family (application)

EP 2009067560 W 20091218; EP 09795435 A 20091218; ES 09795435 T 20091218